Why do you think that there are no US forces there. The US has both soldiers and police stationed in Kosovo.
http://www.nato.int/kfor/structur/nations/placemap/kfor_placemap.pdf
http://www.tffalcon.hqusareur.army.mil/About.html
http://www.tffalcon.hqusareur.army.mil/AboutBondsteel.html
The Serbs have nothing to threaten KFOR with. They have no airpower and are not militarily strong enough to take on what is currently stationed in Kosovo. Think how quickly current KFOR could be re-enforced? Serbia has no airpower. It couldn’t hold ground without air protection. Serbia isn’t even contemplating an invasion of Kosovo and Russia isn’t going to come to its aid.
TANKS a bunch for those great links,,,
That’s the info we could not find,,,